A student created a model to demonstrate the Doppler Effect. Which three statements correctly compare the sound waves experienced by observer A and observer B? Select 3 statements that apply. A. Observer B experiences a wave with fewer crests. B. Observer B experiences a wave with lower energy. C. Observer b experiences a wave with a higher pitch. D. Observer b experiences a wave with a slower speed. E. Observer b experiences a wave with a higher frequency. F. Observer b experiences a wave with a shorter wavelength.

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.